Insulator-bracket



(No Model.)

T. H. BRADY.

INSULATOR BRACKET. No. 476,604. Patented June 7, 1892.

40 10 153W 4 My UNITED STATES PATENT OFFICE.

THOMAS H. BRADY, OF NEIV BRITAIN, CONNECTICUT.

INSULATORI-BRACKET.

' PECIFICATIOI\T forming part of Letters Patent No. 476,604, dated June '7, 1892.

Application filed April 9, 1892. Serial No. 428,532. (No model.)

T0 at whom it may concern:

Be it known that I, THOMAS H. BRADY, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Insulator-Brackets, of which the following is a specification.

My invention relates to that class of brackets which are adapted to be attached to the walls or roofs of buildings or other supports for holding electrical insulators, upon which the Wires of atelegraph, telephone, fire-alarm, or lighting system are to be strung, the object being to provide a cheap bracket of this class so constructed that in expanding orcontracting under the influence of the natural changes in temperature or effect of sunlight it will not break or crack the glass, porcelain, lava, or other insulating substance which it supports.

In the accompanying drawings, Figure 1 is a side view of a bracket, and an insulator is indicated by broken lines. Fig. 2 isacentral vertical section, and Fig. 3 is a horizontal section of the same on the line 0c 0:, Fig. 1.

In the views, 1 indicates the shank of the bracket, which is usually formed from a piece of round rolled or drawn iron rod, with one end flattened or perforated for the reception of holding-screws. The head of this bracket,

which is a thin-walled shell 2, usually made of cast-iron, has a threaded exterior, upon which the insulator 3, of common form, is

screwed, and a central perforation, so that it may he slipped upon the end of the shank, to which it is riveted or soldered. This perforation at the ends of the shell is ofasize that fits the shank; but it is enlarged at the center, so that an air chamber or spaces is formed on the interior between the shank and the threaded shell or headof thebracket. Openings 5 may, if desired, be made through the side walls of this shell from the chamber to the exterior.

I claim as my invention 1. An insulator bracket consisting of a shank and a hollow head secured to the shank, with an interior space between the shank and head, substantially as (l6SCllbG(.l,tl1(l for the purpose specified.

2. An insulatorbracket consisting of a shank and a threaded hollow head secured to the shank, with an interior space between the shank and head, substantially as described, and for the purpose specified.

3. Au insulator bracket consisting of a shank and a hollow head secured to the shank, with an interior space between the shank and head and openings through the walls of the head, substantially as described, and for the purpose specified.

THOMAS II. BRADY.

Witnesses:

BRAYTON S. LEwIs, JOHN H. KIRKHAM. 

